Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!tut.cis.ohio-state.edu!netsys!vector!telecom-gateway
From: schriste@uceng.uc.edu (steven v christensen)
Newsgroups: comp.dcom.telecom
Subject: Phone-in-use indicator
Message-ID: <telecom-v09i0192m05@vector.dallas.tx.us>
Date: 9 Jun 89 20:52:55 GMT
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X-TELECOM-Digest: volume 9, issue 192, message 5 of 9

A while ago someone posted a question for some kind of indicator
to tell that another extention is in use. Someone suggested a
battery and light on the other 2 wires of a phone line.

Does anyone have a circuit which senses the voltage drop when someone
picks up the phone? It would seem to me to be easier to do.

Steven
schriste@uceng.uc.edu